Grigor Boykov, "Ethnic and Religious Features of the Ottoman City of Filibe (the End of 15th and the Beginning of 16th c.)"(in Bulgarian), Balkan Identities, E. Radushev and Ts. Georgieva (eds.), (Sofia: Open Society Foundation, 2003), 130-151.

Grigor Boykov and Mariya Kiprovska, "The Ottoman Philippopolis (Filibe) during the Second Half of the 15th c.", Bulgarian Historical Review, 3-4 (2000): 112-138.